I just tried a new time, and a i tick the checkbox: Include client application. In this context the export war works fine.
If I does not include the client the error is below:
It seems the problems is here:

The Export War Wizard try to build a client product, even if the checkbox is untick ?

Stacktrace

org.eclipse.core.runtime.CoreException: could not create 'servletbridge.jar' in temp folder
at org.eclipse.scout.sdk.operation.export.ExportServerWarOperation.run(ExportServerWarOperation.java:114)
at org.eclipse.scout.sdk.jobs.OperationJob.run(OperationJob.java:83)
at org.eclipse.scout.sdk.jobs.AbstractWorkspaceBlockingJob.doRun(AbstractWorkspaceBlockingJob.java:62)
at org.eclipse.scout.sdk.jobs.AbstractWorkspaceBlockingJob.run(AbstractWorkspaceBlockingJob.java:40)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: java.lang.NullPointerException
at org.eclipse.pde.internal.core.product.WorkspaceProductModel.load(WorkspaceProductModel.java:42)
at org.eclipse.scout.sdk.operation.export.ExportServerWarOperation.buildClientProduct(ExportServerWarOperation.java:134)
at org.eclipse.scout.sdk.operation.export.ExportServerWarOperation.run(ExportServerWarOperation.java:101)
... 4 more

Hello,
Thanks for help.
No problemn when writing into the temp directory.
I thought that the pb is the NPE when trying to export a war without including the client side:

Caused by: java.lang.NullPointerException
at org.eclipse.pde.internal.core.product.WorkspaceProductModel.load(WorkspaceProductModel.java:42)
at org.eclipse.scout.sdk.operation.export.ExportServerWarOperation.buildClientProduct(ExportServerWarOperation.java:134)
at org.eclipse.scout.sdk.operation.export.ExportServerWarOperation.run(ExportServerWarOperation.java:101)
... 4 more